scholarly journals Curvature estimates in dimensions 2 and 3 for the level sets of $p$-harmonic functions in convex rings

2012 ◽  
Vol 364 (9) ◽  
pp. 4605-4627 ◽  
Author(s):  
Jürgen Jost ◽  
Xi-Nan Ma ◽  
Qianzhong Ou
Keyword(s):  
Level Sets ◽  
Harmonic Functions ◽  
Curvature Estimates

scholarly journals Level sets of harmonic functions on the Sierpiński gasket

2002 ◽  
Vol 40 (2) ◽  
pp. 335-362 ◽  
Author(s):  
Anders Öberg ◽  
Robert S. Strichartz ◽  
Andrew Q. Yingst
Keyword(s):  
Level Sets ◽  
Harmonic Functions ◽  
Sierpinski Gasket ◽  
Sierpiński Gasket

A Topological Characterization of Conjugate Nets

1977 ◽  
Vol 29 (4) ◽  
pp. 707-721
Author(s):  
Paul A. Vincent
Keyword(s):  
Level Sets ◽  
Harmonic Functions ◽  
Function Theory ◽  
Topological Analysis ◽  
Topological Characterization ◽  
Families Of Curves ◽  
Open Maps

One aspect of topological analysis that authors, such as G. T. Whyburn and Marston Morse, have pointed to ([16; 6] for instance) as being fundamental in the development of function theory is the topological study of the level sets of analytic and harmonic functions or of their topological analogues, light open maps and pseudo-harmonic functions. The first step in this direction seems to have been made by H. Whitney [14] when he studied families of curves, given abstractly using a condition of regularity.

On p-harmonic functions, convex duality and an asymptotic formula for injection mould filling

1996 ◽  
Vol 7 (5) ◽  
pp. 417-437 ◽  
Author(s):  
Gunnar Aronsson
Keyword(s):  
Power Law ◽  
Level Sets ◽  
Harmonic Functions ◽  
Moving Boundary ◽  
Polymer Melt ◽  
Injection Point ◽  
Mould Filling ◽  
Power Law Exponent ◽  
Mould Cavity ◽  
Plastic Case

This work treats the injection of certain thermoplastics into a planar mould cavity. The problem is to determine the filling pattern. It is assumed that the thermoplastic can be modelled as a non-Newtonian fluid of power-law type whose power-law exponent is relatively small (the pseudo-plastic case). The dependence of the viscosity on thermal variations is neglected. The mathematical description leads to a moving boundary problem, for which an asymptotic solution is found. According to this solution, the expansion of the polymer melt follows the level sets of an interior distance function, which is determined by the geometry of the mould, and the position of the injection point. The solution is easily computed and results of numerical experiments are given.

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